package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

/**
 * @BelongsProject: reggie_take_out
 * @BelongsPackage: com.itheima.reggie.service.impl
 * @Author: 许子康
 * @CreateTime: 2023-01-11  11:06
 * @Description: TODO
 * @Version: 1.0
 */

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private SetmealService setmealService;

    @Autowired
    private DishService dishService;

    /**
     * 根据id删除分类,删除之前需要判断
     *
     * @param ids
     */
    @Override
    public void remove(Long ids) {
        LambdaQueryWrapper<Dish> dishLambdaQueryChainWrapper = new LambdaQueryWrapper<>();

        //添加查询条件,根据分类id进行查询
        dishLambdaQueryChainWrapper.eq(Dish::getCategoryId, ids);
        int count1 = dishService.count(dishLambdaQueryChainWrapper);
        //查询当前分类是否关联菜品,如果已经关联,抛出一个业务异常

        if (count1 > 0) {
            //已经关联菜品,抛出业务异常
            throw new CustomException("当前分类下关联了其他菜品,不能删除");
        }

        //查询当前分类是否关联套餐,如果已经关联,抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryChainWrapper = new LambdaQueryWrapper<>();
        //添加查询条件,根据分类id进行查询
        setmealLambdaQueryChainWrapper.eq(Setmeal::getCategoryId, ids);
        int count2 = setmealService.count(setmealLambdaQueryChainWrapper);
        if (count2 > 0) {
            //已经关联套餐,抛出业务异常
            throw new CustomException("当前分类下关联了其他套餐,不能删除");
        }

        //正常删除分类

        super.removeById(ids);
    }
}
